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nikklg [1K]
3 years ago
14

Factorise cos^2a - sin^2a​

Mathematics
1 answer:
sveticcg [70]3 years ago
7 0

Answer:

cos(2a)

Step-by-step explanation:

cos²(a)-sin²(a)=cos(2a)

cos²(a)-sin²(a)

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